[Improvement] Store role, user, and group under {metalake}.system.{role|user|group} in relation storage

[lw-yang]

What would you like to be improved?

support storing role, user, and group under and {metalake}.system.{role|user|group}, which is aligned with kv storage

we only store metalake now, and we need to add catalog and schema

ref: #3031

How should we improve?

No response

[jerryshao]

@lw-yang would you please work on this when you have time? Thanks a lot.

[lw-yang]

@jerryshao Sure, it's on my schedule, I will make sure to complete it by next week, thanks for the heads up